13.2

Question 1

function of pyramid of numbers

Answer 1

allows us to compare the number of organisms in each trophic level at a particular time

Question 2

what are the limitations of pyramid of numbers

Answer 2

does not represent the size and mass of organisms, does not consider if organism is an adult or juvenile

Question 3

what is the function of pyramid of biomass

Answer 3

allows the comparison of the dry mass of organisms present in each trophic level at a particular time

Question 4

what is dry mass

Answer 4

mass of organism when all its water has been removed

Question 5

what are the limitations of pyramid of biomass

Answer 5

organisms have to be killed to obtain biomass, it has to be constructed at a particular point in time

Question 6

when can a pyramid of numbers be inverted

Answer 6

when organisms in one trophic level are parasitic, and many small organisms of a trophic level feed on a large organism of another trophic level

Question 7

an advantage of pyramid of numbers

Answer 7

data is easier to obtain

Question 8

advantage of pyramid of biomass

Answer 8

takes into account the size of organisms

Question 9

disadvantage of pyramid of biomass

Answer 9

does not take into account rate of reproduction of organisms